Illustrator: Laurie Klingensmith

Copyright: Flora of North America Association

Plants becoming terrestrial. Rootstock nearly globose, 2-lobed. Leaves deciduous, bright green, pale toward base, spirally arranged, to 12(–20) cm, pliant, gradually tapering to tip. Velum covering entire sporangium. Sporangium wall unpigmented. Megaspores light gray to gray-brown, 290–360 μm diam., obscurely rugulate with low ridges; girdle obscure. Microspores brown in mass, 30–33 μm, tuberculate to spinulose. 2n = 22.

Phenology: Spores mature in winter or spring.
Habitat: Shallow depressions on granite outcrops

Distribution

• Generated Map
• Legacy Map

Loading map...

Tex.

Discussion

Isoëtes lithophila is known from granite outcrops in Burnett, Mason, and Llano counties in south central Texas.

Of conservation concern.

Selected References

None.

Lower Taxa

None.